Improved door-knob



nite-ii tat@ JEREMIALHVJ. Kino, OF'NEW Yours-N. Y.

Letters Patent No. 95,024,1latell September 21, 1869.

IMPRovnD vnoon-1mois..

The Schedule referred colin these Letters Patnt andmaking part of the sme.

To all inkom 'it may concern:

Be it known lthat I, JEREMIAH J. K1NG,'of the city, county, and State of New York, have made certain new and useful Improvements in Constructing Door-Knobs; and Ido hereby declare that the following is a full, clear, and exact description of the same, referencebeing had tothe accompanying drawings, and letters of reference marked'thcreon.

In the manufacture of the 'ordinary'.knobs for( door-locks, the knob is secured to the'V metal socket in which ythelock-arbor is iitted, by means of cement-k ing or casting the end of the socket with lead into the knob. The socketfis maden/ith lips, a a, as shown in g..1`, andthe knobvhas a central cavity, 71, and from itscveral outward-'spreading cavities, c c, for the lead, so that when the lips aua are placed i the cavity l), the soft lmetal -or lead is filled in around the end,v of the socket,fas shown in iig. 2, inf-which e represents the lead or metal cast in tbc knob to which the socket is secured..

In` this inode of securing the knob, the leader metal for casting has to. bc used very hot to run it, and consequently many of the knobs crack from unequal eX- pansion, and generally inthe direction as shown by the line ff, in fig. 2.

In pouring the lead or melted metal,although with care, it' frequently obstructsl` the' required aperture, through the socket for the lock-arbonand in consequence the saidaperture has to be reamed out, and

- v for making up for the shrinkage ofthe lead, is rammed down, a mandrel of proper size is driven in, as shown in red liuein ig.2, by which operation also great many knobs are crackedland destroyed.

The object offthis invention is tosecure thesocket. to the knobin a more reliable and'less risky and expensive manner, and so thatthe cernenting of lead is entirely dispensed jwith, and that the knob is durably secured with little labor and'expensc.

The nature of this invention consists in providing andconstructing the socket with expansiblel-prongs,

land the knob with corresponding outward-extending cavities,so that, by forcing or. pressing theV socket,

with its prongs, into the cavities of the knob snci- `ently that the shoulder on the socket meets upon the `faceo the knob, the socket interlocks inthe knob and becomes tightly secured therein.` `By these means the casting on of the socket is dispensed with. They l can be easily secured without cracking the knobs, and the expense of the metal to cast them in, and a great deal of labor is Saved, and the knob more durawith those heretoibre ble and better secured than known or used. y To enable others skilled in tbc art to make and use l same.

vertical' section of the knob Atothe several figures,

.A represents the usual shank, and B the ordinary shoulder, and C the usual square aperture for the lock-arbor 'of the socket.` y I Now, in front of the shoulder, I construct the socket with a small shoulder, O', and extending from it two,

three, or more prongs, D D D, which arecast Qn, and

form part of the same. They are distributed at equal g distance apart and around from the aperture C;

E represents a central cavity formed in the face of knob suiiciently large for the small shoulderC to.

enter. On the corner of its termination I con'- struct the knob with several deep holes or cavities F F F corres )ondino' ontheir entrance for 7 7 b 7 the prongs l) D l) to enter while spreadingv to-l ward the periphery of the knob, and the prongs D D are made of proportionate length and thickness to allow of' being bent and spread into these cavities F F F. y The outer endsof the prongs I prefer.` to have tapered off, as shown at a, from their inside toj the outside on their ends.

`Now, after having the knob and sockets, cast or moulded on hand, as described, the same are secured together in the simple manner of placing the prongs of the socket in the respective cavities FV F F of the knob, and the socket, with theknob, is placed in a vise or other means for pressing, as shown-'in iig. 7, and by applying the pressure the-prongs ofthe socket are forced' and spreadin the holesF F until the shoulder B. rests against the face of the knob, whereafter the socket isrcoxnpletely 'secured to the knob and is removed from the vise.

Iu sockets made of cast-iron or other more brittle substances, I construct the prongs of soft metal, such as wrought-iron and cast them with the socket;

.By these means the metal for casting on the socket4 on the knob is saved the labor of ramming and reaming thersocket, and after heilig secured, is dispensed with, and great many knobs are saved which are now The knob formed with a central cavity, E, and

broken and destroyed by pouring the hotmetal thereinclined channels, F F, into which the prongs D on, and by reaming the socket and ramming the ,lend D of the socket A are made to enter by pressure down, and the socket is more firmly secured in the onl The socket, without the aid of separate wedges,

A knob than with those heretofore. as herein shown and described, for the purpose speci- I am aware of the patent granted to William Boch, fied. dated March 24th, 1868, but his invention I disclaim. JEREMIAH J. KING.

Having fully desciibed my invention. "Witnesses: What I claim therein, and desire to secure by Let-4 R. BOEKLEN, ters Patent is- J. BERMOND. 

